90620399 has 2 divisors, whose sum is σ = 90620400. Its totient is φ = 90620398.

The previous prime is 90620377. The next prime is 90620417. The reversal of 90620399 is 99302609.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90620399 - 2⁸ = 90620143 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90620359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45310199 + 45310200.

It is an arithmetic number, because the mean of its divisors is an integer number (45310200).

Almost surely, 2^90620399 is an apocalyptic number.

90620399 is a deficient number, since it is larger than the sum of its proper divisors (1).

90620399 is an equidigital number, since it uses as much as digits as its factorization.

90620399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 90620399 is about 9519.4747229036. The cubic root of 90620399 is about 449.1678431630.

It can be divided in two parts, 90620 and 399, that added together give a palindrome (91019).

The spelling of 90620399 in words is "ninety million, six hundred twenty thousand, three hundred ninety-nine".